# US 2014/0196978 A1 · Silencer and method for manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196978 A1 - Document ID: US20140196978A1 - Status: Published application - Kind: A1 - Application number: 14/154,363 - Filed: 2014-01-14 - Published: 2014-07-17 - Earliest claimed: 2013-01-16 - Assignees: Henn GmbH & Co KG. - Applicants: Henn GmbH & Co KG. - Inventors: Harald HARTMANN - Web page: https://patentgrep.com/patent/US20140196978A1 ## CPC - F02M 35/1283: {Manufacturing or assembly; Connectors; Fixations} - F02B 33/44: Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs - F02M 35/1036: {by welding, bonding or the like (welding plastic materials together in general B29C65/02)} - F02M 35/1266: {comprising multiple chambers or compartments} - F01N 1/026: {Annular resonance chambers arranged concentrically to an exhaust passage and communicating with it, e.g. via at least one opening in the exhaust passage} - F01N 13/1872: {the assembly using stamp-formed parts or otherwise deformed sheet-metal} - F01N 13/1888: {the housing of the assembly consisting of two or more parts, e.g. two half-shells} - Y10T 29/49398: Muffler, manifold or exhaust pipe making - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The invention relates to a silencer (1) and a method for manufacturing a silencer (1), in particular a vehicle silencer, having an inner pipe section (2) and at least one resonator chamber (14, 15) embodied outside the pipe section (2), with the shell (3) of the pipe section (2) having at least one opening (7, 8) that connects the interior of the pipe section (2) with the resonator chamber (14, 15). For simplifying the production process as well as for material and weight savings, the shell segments (4, 5, 6) are prefabricated as individual components and the shell of the inner pipe section (2) is formed by assembling the prefabricated shell segments (4, 5, 6), with the shell segments (4, 5, 6) being arranged to be spread along the circumference of the pipe and extend in axial direction from a first connecting piece (11) to a second connecting piece (12) each, and first ends (9) of the shell segments (4, 5, 6) are connected with the first connecting piece (11) and second ends (10) of the shell segments (4, 5, 6), lying opposite the first ends (9), being connected with the second connecting piece (12). ## Claims ### Claim 1 Silencer (1), in particular a vehicle silencer, having an inner pipe section (2) and at least one resonator chamber (14, 15) embodied outside the pipe section (2), with the shell (3) of the pipe section (2) having at least one opening (7, 8) that connects the interior of the pipe section (2) with the resonator chamber (14, 15), wherein the shell (3) of the inner pipe section is composed of at least three shell segments (4, 5, 6) arranged to be adjacent along the circumference of the pipe, which shell segments extend from a first connecting piece (11) to a second connecting piece (12) each, with first ends (9) of the shell segments (4, 5, 6) being connected with the first connecting piece (11) and second ends (10) of the shell segments (4, 5, 6), arranged opposite the first ends (9), being connected with the second connecting piece (12). ### Claim 2 (depends on 1) Silencer according to claim 1, wherein the shell (3) of the inner pipe section (2) is composed of three shell segments (4, 5, 6), each extending along the circumference of the pipe about essentially 120°. ### Claim 3 (depends on 1) Silencer according to claim 1, wherein the shell segments (4, 5, 6) are made of individual, pre-bent pieces of sheet metal (19), preferably of stainless steel sheets. ### Claim 4 (depends on 1) Silencer according to claim 1, wherein the first ends (9) and/or the second ends (10) of the shell segments (4, 5, 6) are welded or connected in a force-fitting manner to the first and/or the second connecting piece (11, 12). ### Claim 5 (depends on 1) Silencer according to claim 1, wherein the first ends (9) and/or the second ends (10) of the shell segments (4, 5, 6) each have at least one flange-shaped section (21). ### Claim 6 (depends on 1) Silencer according to claim 1, wherein the first ends (9) and/or the second ends (10) of the shell segments (4, 5, 6) each have at least one skirt-shaped section (22), with the skirt-shaped section (22) resting against a connecting piece (12). ### Claim 7 (depends on 1) Silencer according to one of claim 1, wherein the axially running edges (13) of the adjacent shell segments (4, 5, 6) rest against one another in a loose manner, and wherein preferably a slot which extends in axial direction is embodied at least between two adjacent shell segments (4, 5, 6). ### Claim 8 (depends on 1) Silencer according to claim 1, wherein the cross-section of the shell segments (4, 5, 6) is, perpendicular with respect to the axial direction, embodied to be arc-shaped, preferably circular-arc-shaped. ### Claim 9 (depends on 1) Silencer according to claim 1, wherein each shell segment (4, 5, 6) has one, preferably two, recesses (17, 18) forming the openings (7, 8) in the shell of the inner pipe section (2). ### Claim 10 (depends on 1) Silencer according to claim 1, wherein the shell segments (4, 5, 6) forming the inner pipe section (2) are of the same size and shape, with preferably shape, arrangement and size of the recesses (17, 18) being the same in all shell segments (4, 5, 6). ### Claim 11 (depends on 1) Silencer according to claim 1, wherein the at least one resonator chamber (14, 15) surrounds the inner pipe section (2) along its entire circumference. ### Claim 12 (depends on 1) Silencer according to claim 1, wherein the silencer (1) has at least two resonator chambers (14, 15) which are separated from one another and arranged to be one behind the other in axial direction, with the shell (3) of the inner pipe section (2) having first openings (7) which open into the first resonator chamber (14), and second openings (8) which open into the second resonator chamber (15). ### Claim 13 (depends on 1) Vehicle, in particular road vehicle, having a silencer (1), in particular a turbocharger silencer, which is arranged on the discharge side of a turbocharger (23), wherein the silencer (1) is a silencer according to claim 1. ### Claim 14 Method for manufacturing a silencer (1), in particular a vehicle silencer, having an inner pipe section (2) and at least one resonator chamber (14, 15) embodied outside the pipe section (2), with the shell (3) of the pipe section (2) having at least one opening (7, 8) that connects the interior of the pipe section (2) with the resonator chamber (14, 15), wherein the shell segments (4, 5, 6) are prefabricated as individual components, and wherein the shell of the inner pipe section (2) is formed by assembling the prefabricated shell segments (4, 5, 6), with the shell segments (4, 5, 6) being arranged to be spread along the circumference of the pipe and extending in axial direction from a first connecting piece (11) to a second connecting piece (12) each, and wherein first ends (9) of the shell segments (4, 5, 6) are connected with the first connecting piece (11), and second ends (10) of the shell segments (4, 5, 6), lying opposite the first ends (9), are connected with the second connecting piece (12). ### Claim 15 (depends on 14) Method according to claim 14, wherein the shell (3) of the inner pipe section (2) is composed of at least three shell segments (4, 5, 6), preferably of three shell segments (4, 5, 6), each essentially covering 120° of the circumference of the pipe. ### Claim 16 (depends on 14) Method according to claim 14, wherein each of the shell segments (4, 5, 6) is manufactured by way of bending a piece of sheet metal (19), preferably a stainless steel sheet, with the shell segment (4, 5, 6) being brought into a shape having an arc-shaped, preferably circular-arc-shaped, cross-section by way of the bending process. ### Claim 17 (depends on 16) Method according to claim 16, wherein prior to the bending process, the pieces of sheet metal (19) are cut out of an essentially planar metal sheet (20) to have the size of the shell segments (4, 5, 6), wherein preferably the metal sheet (20) is provided having the shape of a strip of sheet metal, the width of which already corresponds to the width of the shell segment (4, 5, 6) to be prefabricated. ### Claim 18 (depends on 16) Method according to claim 16, wherein prior to the bending process, recesses (17, 18) are brought into the piece of sheet metal (19), which recesses form openings (7, 8) in the shell (3) of the inner pipe section (2) when the shell segments (4, 5, 6) are in their assembled state, wherein preferably the formation of the recesses (17, 18) is performed by laser machining. ### Claim 19 (depends on 14) Method according to claim 14, wherein at least one flange-shaped section (21) and/or at least one skirt-shaped section (22) is formed on each of the first ends (9) and/or second ends (10) of the shell segments (4, 5, 6). ### Claim 20 (depends on 14) Method according to claim 14, wherein the first ends (9) and/or the second ends (10) of the shell segments (4, 5, 6) are welded or connected in a force-fitting manner to the first and/or the second connecting piece (11, 12).